HI
I would suggest you postpone your flight. My parents have just rung to let me know their flight tonight which was meant to depart at 6.30pm Sat 19 Dec was cancelled after they sat on the plane waiting to take off for over 4 hours. Luckily my parents have accom but apparently their are children and adults stranded at the airport with just blankets. They don't know when they may be flying home to OZ due to the storm.
Good luck with your travel plans - but if I was you I would avoid a trip to NYC in the next couple of days...
A
Qantas flight cancelled Sat 19 Dec 6.30pm JFK